Door crack issue

[lukedukem]

I was cleaning up the door jambs on my 69 super bee and noticed a crack on the door. I also have the same crack on my 69 charger. what is it with these doors and the cracks. do I just have bad luck. the door still functions, any one else have this issue. what the fix?
pics below

Luke

[Mopar Nut]

My 69 Charger has the same crack to. 

[kent]

My body man is 63 years old and he said the b-bodies were notorious for cracking there. He said he fixed quite a few back in the day.  Never really said why just figured it was flex in the unibody.

[tan top]

 check for worn door hinge pins or door out of alignment  , does the door drop when you open it ?

[lukedukem]

check for worn door hinge pins or door out of alignment  , does the door drop when you open it ?

They both have some sag  in them. I suspect that the crack is caused when the door has a sag and the owner closes it over and over again. How is this fixed, besides new hinges, just grind and weld the crack? Has anyone done this.

Luke

[krops cars]

I have also seen it more so on GM's. Hinge pin bushings. You do not realize that the door is shutting harder. Then you look. I had to fix the jam on the drivers side of my car.

[tan top]

check for worn door hinge pins or door out of alignment  , does the door drop when you open it ?

They both have some sag  in them. I suspect that the crack is caused when the door has a sag and the owner closes it over and over again. How is this fixed, besides new hinges, just grind and weld the crack? Has anyone done this.

Luke

replace the hinge pins or get a set of rebuilt originals  , ( would never use repop hinges )
yes weld ! removed lock /latch ,  clean up to good clean shiny metal both sides if you can.
 with a small drill bit, drill  end / ends of the crack to stop crack spreading, then weld it up!  then  finish in normal way filler / primer / top coat  what ever it needs .
see link below  for door alignment info
http://www.dodgecharger.com/forum/index.php/topic,117250.msg1454732.html

[krops cars]

That is a good tip. I never hear of drilling to stop the crack. Do you use that technique on all thicknesses of steel that has cracked? Or light gauge?

[tan top]

That is a good tip. I never hear of drilling to stop the crack. Do you use that technique on all thicknesses of steel that has cracked? Or light gauge?

yes when welding cracks  all thicknesses  of  metal / steel  , aluminum ,  cast iron ,  even plastic parts ,  

[lukedukem]

Thanks tan. I have heard about the repop ones and them being no good. Guess I need two sets now. Or rebuild these myself.

Luke

[green69rt]

There are reinforcement plates you can get after you fix the crack.

http://www.dynamicrenovation.net/viewitem.php?productid=81

http://www.dynamicrenovation.net/viewitem.php?productid=82

[lukedukem]

Where's the best place to get the rebuild kits

Luke